Rockwell Automation 2706 DL20 SERIES G USER MANUAL - Manual (Page 48)

Chapter 4
Creating and Editing Messages
4–22
The example below shows how to estimate memory usage. Every message
programmed has 14 bytes of overhead. Also, every space, control T, control
V, and control X also use one byte.
Example: DL20 contains 475 messages with an average length of 35
characters.
31,000
-23,275
7,725
Total Memory Available
Total Memory
Unused Memory
(475 x 14) + (475 x 35) = 23,275
Overhead + Message Text = Approximate Total
The Historical Events Stack uses a maximum of 3000 bytes of unused
memory. If the Historical Event Stack is used in your application, enough
non-message memory space should be allocated.
Estimating Memory Usage